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Full Discussion: How to wait for a grand child to finish?
Top Forums UNIX for Dummies Questions & Answers How to wait for a grand child to finish? Post 302929071 by bakunin on Wednesday 17th of December 2014 12:16:47 PM
Old 12-17-2014
You could write a waiting loop, like this:

Code:
start_p2 &
while [ $(ps -fe | grep start_p3 | wc -l) -le 1 ] ; then
     print - "process not started yet"
     sleep 1
done
print - "process start_p3 has started"

Notice that you need to query for more than one process because "grep start_p3" will be found by "grep start_p3" as a process too.

Alternatively add a "grep -v grep" to the pipeline and change the comparison to "-lt 1".

I hope this helps.
 

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LEARN ABOUT ULTRIX

zgrep

ZGREP(1)						      General Commands Manual							  ZGREP(1)

NAME

       zgrep - search possibly compressed files for a regular expression

SYNOPSIS

       zgrep [ grep_options ] [ -e ] pattern filename...

DESCRIPTION

       Zgrep  invokes  grep  on  compressed  or  gzipped  files.   These  grep	options  will  cause  zgrep  to  terminate  with  an  error  code:
       (-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*).  All other options specified are passed directly to grep.  If no file is specified,  then  the
       standard input is decompressed if necessary and fed to grep.  Otherwise the given files are uncompressed if necessary and fed to grep.

       If the GREP environment variable is set, zgrep uses it as the grep program to be invoked.

EXIT CODE

       2 - An option that is not supported was specified.

AUTHOR

       Charles Levert (charles@comm.polymtl.ca)

SEE ALSO

       grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1)

																	  ZGREP(1)
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